Arrowhead



E. J. HENKEL April 8, '195s ARROWHEAD Filed Jan. 10. 1956 mownn-Anapplication JanuaryeioasssfserNoassazsi (Ciara-1065) tiisrventionrelatest oanimprove`ment in arrowheads .and ldealsmoreparticularly v'witharrowheadsaxsed 'for 2,829,894 Patented Apr. 8, 1958 iCC lbroadhea'dblade. When so utilized,'theremovable-blade is mounted at "a substantialangle, preferably ninety degrees, to the primary blade to provide "a.-large'cutting -areawithout hicreasingthe 'weight 'sutlicientlytoxlecrease penetration. :In'this embodiment 'the primary bla'dehas an`opening through its -base 'to receive the ferrule 'and tits, 'at theforward terminus 'of -the opening, into a bifurcatedtip ofthe ferruleand 'is secured therein. The primary blade is further secured -to the,ferrule by grooved projections on the rearward surface `o'f the ferrulewhich receive and retain thehlade .edges which bind the openingin thisblade. As used herein, forward refers '.tothe pointed end 'of thearrowhead.

Forthepurpose of illustration a specific embodiment of the inventionisshown inthe accompanying drawingin which Fig. l is a plan view Aof thearrowhead showingthe auxiliary blade inposition;

.,Fig. 2 is.a side view of the arrowhead;

.Fig. 3 is asection on line '3-3 of Fig. 2;

.Fig- 4 isapl'an view ,of .the ,auxiliary blade .detached from thearrowhead; and

Y Fig. 5 is a, plan view of'the arrowhead .illustratingfthe method ofattachingthe auxiliary 'blade'. L. p "The arrowhead llustratdiintheaccompan" 7 .daw7 ing compises 'three main parts, a truncated cqnicallyshaped ferrule .-A. serving as a .hub,socket.for the.arrowif'nefrbectfof-thc -present invention is to provide` an Another-object to provide a sharpness inan'arrowheddtwqichlwill-bedight-in'weight and 'which will notappreciably reduce velocity and penetration. Further objects are toprovide an arrowhead having a blade which need not be sharpened andhoned in the eld and to provide an arrowhead wherein the blades areremovable and replaceable so that new blades may be inserted easily andrapidly in the field.

In'accordance with the present invention, the above objects are achievedby providing an arrowhead having a blade which is removable andreplaceable by insertion of the blade edgewise through a slot in theside of the circular hollow center of the arrowhead, herein called aferrule to include any hollow structure adapted to receive anarrow-shaft. The blade has a resilient arm and the blade and ferrulehave intertting portions which snap into interlocking relationship todetachably hold the blade in the head. The blade is preferably made ofhard, extremely thin, razor-like steel so that it will be light and canbe pre-honed at the factory to maximum razor sharpness. When the bladeis damaged, for example by a shot that misses, the used blade is removedand discarded and a new one inserted.

In a particular aspect the present invention includes an arrowheadhaving a blade which is provided with an opening through its base toform, at the forward end of the opening, rearwardly projecting shouldersengaging opposite sides of the ferrule and, at the rearward end,C-shaped resilient arms having lugs on the extremity of the nturningends. The blade is inserted edgewise in a slot extending through theferrule, the projecting shoulders aligning the blade axially with theferrule, and the lugs on the arms snapping into cooperating openings inthe ferrule to detachably secure the blade to the head.

In the preferred embodiment of the invention, the removable blade isutilized as an auxiliary blade in an arrowhead also having a primary,relatively thick,

shaft,A a` primary 'broad-head bladeB, and a replaceable auxiliaryblaileC. Y vy lv i;

"Ihe .ferrule A.has a .bifuncated tip .1, a transverse slot 2, retainingopenings 3, and grooved projections 4 :in its rearward wall. .The,projections 4.are formed, for example,.by.striking themallnf theferrule. A. V

'The Blade'B.has.sharpened.edges 5 diverging fromran acute angle point 6and an opening D through its base to receive the ferrule. This openingis enlarged in its middle portion to reduce the weight of the blade. Theblade B is secured to the ferrule by-insertion, at the forward terminus7 of the opening D, into the bifurcated tip 1 of the ferrule and bypinching the sides of the ferrule tip securely against the blade orriveting at 8. The blade is further secured to the ferrule by insertingthe edges 9 of the blade into the ferrule projections 4. If desired, theedges 9 may be secured in the projections 4 by brazing or silversoldering.

The auxiliary blade C comprises diverging cutting edges 10 and anopening E through its base to form a transverse abutment edge 1l withrearwardly projecting shoulders l2, and C-shaped arms 13 turninginwardly from the rearward ends 14 of the cutting edges 10. The ends 15of the projecting arms are provided with lugs 16.

To position the blade C in the ferrule A, one of the C-shaped arms 13 isinserted through the forward slots 2 in the ferrule. The blade is thenrotated sufficiently to align it axially with the ferrule and the blademoved rearward of the ferrule to contact the edge 11 of the blade withthe rear edge of the slot 2. To facilitate insertion and rotation of theblade C in the slot 2, the other C-shaped arm may be tiexed over theferrule A or the slot 2 may be extended forwardly sufficiently to makesuch flexing unnecessary. The shoulders 12 of the blade contact andalign with the outside surface of the ferrule. The blade is retained inposition by the lugs 16 on the blade arms which snap into thecooperating rear openings 3 in the ferrule. Further alignment of theblade is provided by the edges 1S of the arms which contact the surfaceof the ferrule rearward of the shoulders 12. To retain alignment of theblade with the ferrule, the length a of the blade C should besubstantially the same as the length b between the slot 2 and theopening 3 3 on the ferrule. Alternatively, alignment can be maintainedby providing the lugs 16 at substantially the same length as theopenings k3. Toremove the b1ade the above" procedure is reversed. Thisattachment is illustrated in Fig. 5.

An arrowhead is thus provided .with ablade which is extremely thin andpre-honed at'the factory to an extreme degree of edge sharpness. notpossible in conventional lixed blades. In addition to a greater cuttingarea made possible by this invention, the increased sharpness of theblade herein provided will cut through more arteries and veins, causemore hemorrhage, and thus kill game more surely.

In the embodiment illustrated, the ferrule A and the primary broadheadblade B, without the auxiliary blade C, have utility substantiallysimilar to arrowheads used heretofore. This combination'can thus be used.and sold for non-critical purposes while the auxiliary blade can beinserted where damage is desired.

It is evident that dovetailfbarbs can be provided, if desired, byextending the diverging cutting'edges of the blades rearward. It isfurther evidentthat the ends 15 of the C-shaped arms of the auxiliarybla'de C may be secured to the ferrule A by grooved projections in thewall of the ferrule similar to those illustrated at 4. Such projectionswould replace the 'openings 3 and would make the lugs 16 unnecessary. Itshould be understood that such modifications are included within thescope of this invention.

It should be further understoodthat the present disclosure is for thepurpose of illu'stration'onlyv and that the invention includes allmodilications and equivalents which fall within the scope of theappendedclaims.

' I claim: 1 1. An arrowhead comprising `a ferrule, a main blade on theferrule which projects beyond theV forward end thereof, the arrowheadhaving a slot extending thereand closed at each end, and an arrow-shapedblade recessed at its rearward end, the length of said slot beinggreater than the length of the blade from its tip to the forward end ofsaid recess so that, after the blade has been inserted into the slot, ithas lengthwise movement to an operative position, the blade havingabutment surfaces positioned to be brought into abutting relation to theferrule by said movement and formed to restrain displacement of theblade transversely yof the ferrule, and releasable means to hold theblade against lengthwise movement in said operative position.

2. An arrowhead comprising a ferrule, a main blade on the Iferrule whichprojects beyond the -forward end thereof, the arrowhead having a slotextending therethrough from side to side transversely of the main bladeand closed at each end, and an arrow-shaped blade recessed at itsrearward end to form two rearwardly extending legs, the length of saidslot being greater than the length of the blade from its tip to theforward end of said recess so that, after the blade has been insertedinto the slot by passing one of said legs through the slot, it haslengthwise movement to an operative position, the blade havingtransverse abutment surfaces positioned to be brought into abuttingrelation to the ferrule by said movement and formed to restraindisplacement of the blade transversely of the ferrule, and releasablemeans to hold the blade against lengthwise movement in said operativeposition.

References Cited in the file of-this patent UNrrEDsTATEs PAfrErrrsl

